Tractor



March 30l 1926.

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H. A. STEWART ET AL TRACTOR Filed April 1, 1925 vE5 Sheets-Sheet 2 Swwww w .r VM S s A. Nrw R ws o mA@ m 2m N m A www .MF H.

March 30 1926. 1,578,479

H. ASTEWART EF AL A TRACTOR Filed April l. 1925 3 Shets-Sheet :5

WITNESSES INVENTORS MTQRNE'YS Patented Mar.` 30, #19268." A i UNITEDSTA.;

Es. PA o Erice.

. HENRY ALONZA STEWART AND FRANK LENARD I-IOLT,l 0F tFENNESvSE.

, T o all whom t may` concern STEWART and FRANK LENARD Hour, citizens ofthe United States, andresidentsof Tullahoma, inthe countyvof Coffee 'andState of Tennessee, -have inventedcertain newn land useful Improvementsin Tractors, of which the following is a specificatioiilf Y structions,combinations and arrangements herein 4described .Y and claimed.

An object of the invention is to provide a tractor, intendedparticularly for use on farms, having anovel arrangement of an arch axleand draw bar by means'of which either cultivating or .plowingimplements;

lmay. be drawn, a novel disposition ofv the engine which.` tends toprevent the tractorfrom turning over,A and also a *novel/'airyyrangement of yoke or framework itself."

Other objects and advantages appear in the following specification,reference being f had to the accompanying drawings, iny K vrdrive 'shaft19 by which 1 the differential Whichn y VFigure 1 isa side elevation of-tne improved tractor.

' Figure 2 is a'plan viewthereof.

Figur-e 3 is a cross section taken substan-Iy tially on the line 3-3 ofFigurey 1.- p

VFigure 4' is a detail longitudinal section `*of ltheupper coupling bartakensifibstanl Figurex8 vis a detail sectional view of thel implementhitch.

made of a one-piece axlel which is bent in vthe shape of an inverted Uin the middle to p. provide an arch 2. If the tractor isusedNr forcomparatively liglit'work such' as culti-.

vating growing plants, the implements are hitchedonto the arch 2 bysuit-able means (not shown), the arch axle being sufiiciently heightwithout y,injury thereto.

Coupling plates 3 provide mounts for-a 5 draw bar 4, which when inplace, provides such as plowing.

l @theidrawfba-r'may,be'taken-out. This invention relates toimprovements in y farm tractors,l andV it consists of the con- Figure 5is a detail plan view of ithe cou-v -In carrying out theinventionprovision is appiicatin mea Apri1`1,i925.seria1 No.. 19,978.7.

The `draw bar is separable 'from the tractor, but is intended yto beused forwlieavy"work,l l The coupling plates are Situated ata cornerbetween lthefaxle and uprightlegsof thearcln vThey are permanently :heldin prace 'by bolt-s 5 which also` secure braces GIQUpon. removal ofbolts fr" Figure lill'ustrates an impleinent place. The beam 9fhasahitch 10 4 (Fig.' 8).'

. secur'edvto the Vdraw barf by ineansfof a bolt 11.7 The removal ofthe'boltpermits" disconnectionv of the implement.,` Wheels12 revolve-upon the'. axles l. Eachl of these wheels :carries a largesprocket 13driven by a" chain 14 `vfrom aV small sprocket 15'.

.A two-cylinderitwo-cycle motor 18 has a gearing `isidriven.y Thedriving power is controlled by adisk clutch 20 which is nor- ,'m'allyheld inoperative 'by a spring 21. Upon pulling rearwardly onv theY lever22Y the clutch is rendered operativejtoi transmit iA chain or with 'anarm 24'which`does the necessary the' adjustments of the lever 22.` i

`The motor 18 is mountedy upon the trac.-

The sprockets aref-fixed on the 'ex-' ltremitiesfof al'differentialshaft 16"`wh`icli is Y driven :by 'suitable gearing in the differentialcase 17., l'lhegearin'g will be similar to thatv `found inthedifferential A case of an power to tliecase 17 and thus to thewheels ofthe tractor.,k y ,y l r .Y Y abeg2-3 connects` the lever22"vshiftingofthefclntchfr20..,The chainpasses over v .suitable fguifderollers; 25 ybefore it is-4 attachedto the arm.. O ,ne end of the spring,l 2 1, is also attacliedjtoftlie arm. Thel'quady .rant 26an'd'detent`27 hold i 1 tor frame i'vell in back of the axle; *TliisVxbalances the frameand tends to preventthe ablyI mounted- The forwardlends ,of these yokes vare'attache-d.-to the arched axle 2`by means ofclips 29. 'lherear ends aie at.

Y taclie'd'to afloweryoke 30. The lower yoke 4 isA a twopart member,including a quad-v high to rideover plants .of considerable V in plan(Fig. 2). vThey are vsituated on op@ l posite sides yof vthecOuplingbar33. This.. bar 'is composed of'a pair Vof confronting larch axle2,and braces 41 secured to these framemeinb'ers, assist in i supportingthe f l5:

panels 34 (Figs. 4v and 5) which carry an .upper coupling A35 '(Fig. 7)at the forward end and a piece of timber 36 at the rearward end.' Thecoupling l35 isattachedv tothe`-V arch 2 by a king bolt 37.

An arrangement of Vsuitably'bent bars 38 and 39 completes the major partof the framework. Q It Yis' to--theV latter thatthe braces 6 run. ShortVpieces 40 connect 'the frame members `3 8 and 39 adjacent to the upperyokes 2S andj'consequently the motor. Steering` ofthe tractor is done bya wheel 42V on afshaft 43 which carries .apinion` 44 meshing with thequadrant '31. The'steeringshaft is supported in lsuitable bearings, the

lower one of these-having a cuffl member45 suitably incorporated inthecoupling bar A turn of the hand wheel 42 in either direction brings theventiretractor frame and its carried parts either to theright or left ofthe coupling bar 33, the'king bolt 3T constituting vthe pivot.- Thearcuate v'yoke 30v 'serves asa guide for the frame duringtliisf" vberssituated respectively on'the upper and movement'. AThecoupling barbasa'seat 46to be occupied vby the, operator. various controlling devices(thehand wheel,

f levers', etc.) are accessible from this position.

A number of advantages might be observed -in the improved construction.It is noticeable that the construction -is extremely simple, thereby toa large extent eliminating the rdifficulty in manufacture. The disposiitionr oftliemotor on the framework rmaintains the equilibrium of thetractor upon its l 4.oY

wheels, 'preventing tilting particularlyforyThe novel arrangement ofthecurved rack Q31 and pinion 44 permits the mal'ring yof quick and shortturns. Y Practically all of the mechanism is lsituated above'the frame,leaving the space] underneath" ventirely Vfree for suchearthworl'ringimplements as maybe V i' usedf 'lhey novel arrangement of theclutchV 'controlf permits f the operation 'regardless' of the`positionof the turnable frame 30, 31,'

' guide pulley 25.

' obviously modifications and-changes may be .`While the construction.ofthe improved tractoris that of a generallvpreferred form,

made' without departingfromv the'l spirit of the injention'or the scopeof the claims.

"Weclaimp Y A tractor comprising` an axle having an .ai'ch, wheels onthe ends of the axle, Va frame# All of the direction'.

worlcappliedto the arch', acoupling bar,- means including a king bolt bywhich said Y bar is pivotally attachedv to the arch for horizontal:turning Vof the frameworlnand. a'yoke y includedA insaid frameworkhaving mein bers situated both" above and below said coupling barpermitting said horizontal turning but' tending to preventV the tractorfrom tilting over-forwardly'. i 2. A tractor comprising an axle havinganarch, a coupling bar, means by whichthe Y coupling vbar vis .pivotallyVconnected to` the arch, framework ,applied to the arch axle includinga'yokewhi'ch liasfinembers dis-` posed respectively above and below Ythea shaft'having a pinion meshing'with the rack causing bodily turning ofthe framecoupling bar. l y

3. A tractor comprising an axle, wheels work upon said pivot `inreference tothe vmounted on* the ends .ofthe axle, a coupling vlowersides `of the coupling bar thereby stabilizing the tractor and holdingthe framework down ltothe coupling bar, an

upper yoke attached" to` the framework and i tothe aforesaid Lippervmember thereof,yand

a motor mounted upon `'said upper yoke being situated in proximitytosaidupper and lower members andfinja Vposition 'to the rear vof the axlethereby assisting in preventing the tiltingover of the tractor in theforward A4. A tractor comprisinga'wheeled axle, a. framework secured'ontop vof the axle, a yoke included in lthelframework consisting 'of aVpair of'arcuate members, 'the confronting edgey of onefof said membersbeing toothed; to constitute a rack,bars sec'uringthey ends,

ofthe arcuate members in parallelsplaced relationship, 1 a coupling bar"extending through the space between said members, means including aking bolt by which the' coupling bar is pivotally attached .to `theaxle, said king boltfconstituting they center of said arcuate members,-a steering shaft vhavinga hand wheel, bearing means includingra Vcuifsupporting the shaft, and a pinion iis mounted on the shaft engaging thevteeth of said yrack providing for the bodilyturning ofthe frameworkandits associated. parts uponv` the `king bolt'finv reference to thecouplingbar; c

4rHENRY ALONZA STEWART. Y

